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Washing Instructions for ASOS 4505 Activewear

July 25, 2019

ASOS is an online fashion retailer. Based in London, they sell more than 850 brands of clothing and accessories. That’s not to say that they don’t have their own range of products, though—they do. Some of their collections include ASOS Design, ASOS White, ASOS Edition, and ASOS 4505.

About ASOS

ASOS was founded in 2000 by Quentin Griffiths, Andrew Regan, and Nick Robertson. By 2004, they had introduced their own brand of clothing for women. While they offered kidswear at one point, they now focus on the young adult fashion market.

While their products are online-only (they do not have any physical stores), they do have fulfillment centres in the US, Europe, and the UK. As a matter of fact, they offer shipping to all 196 countries! As of 2023, their headquarters are located in Camden Town, London.

More About ASOS 4505

As mentioned earlier, ASOS has their own brands of clothing. Among them, is ASOS 4505, which is their activewear line. As far as their catalog goes, they offer a variety of items including sports bras, shorts, leggings, tees, sweatshirts, tanks, socks, and more. They also have accessories such as armbands, backpacks, and gloves.

asos4505 line

Price-wise, their sportswear is quite affordable. You’re looking at around $26 for a t-shirt and $35 for a pair of leggings. What’s more, is that they often have sales. If you’re a student, you’re also eligible for a 10% discount—all you need to do is fill in a form on their website!

Taking Care of ASOS 4505

Despite their low price point, ASOS 4505 products are quite durable. Chances are, you won’t run into any problems! As with any clothing, however, you want to make sure that you’re caring for them properly. Even the most durable of shirts can wear down if you wash them incorrectly!

Speaking of which, it’s advised that you wash their garments after each wear. After all, it’s not uncommon for sweat to have penetrated into the fabric. Leave it unattended for a few days and the item can easily develop an odor! Not only that, but the bacteria and dirt can actually cause the material to break down!

Given that, you want to make sure that you’re washing your ASOS 4505 products the right way. Not sure how? We’ll teach you! Keep reading to learn more.

Fabrics Used by ASOS 4505

Before we go into the actual instructions, though, let’s take a quick detour and look at the different fabrics that are used. Remember, different fabrics call for different washing methods! They behave differently in the wash, after all.


Polyester is pretty much the opposite of cotton. For one thing, it’s a type of man-made fiber. Synthesized from plastic products, the fabric is naturally water-repellent (as opposed to cotton, which is highly absorbent). This makes it an excellent choice for athletic clothing as it will not absorb sweat. Extremely strong, it is resistant to most things including wrinkles, stretching, and shrinking.

ASOS 4505 uses polyester for their leggings, sports bras, booty shorts, soccer t-shirts, joggers, and more.


Spandex is similar to polyester in that it’s also synthetic. Also known as “Lycra” or “elastane”, the fabric is prized for its elasticity. Not only that, but it is strong and durable. For these reasons, it’s often incorporated in activewear. It’s worth mentioning, however, that pure spandex is rarely used in garments. Instead, small amounts are woven into other materials such as cotton or polyester.

ASOS 4505 uses polyester for their leggings, sports bras, booty shorts, hoodies, and more.


Polyamide, aka nylon, is a type of man-made fiber that’s been around since the 1930s. Given its durability, it’s not surprising to know that it’s often used for workout clothes. Smooth and flexible, the fibers can be thought of as a silk alternative. Do note, however, that they tend to get damaged if exposed to excess sunlight.

ASOS 4505 uses polyamide for their long sleeve tops, sports bras, base layers, and more.

How to Wash ASOS 4505 Leggings/Yoga Pants/Tights

Let’s take a look at how to wash their clothing now that we know more about their fabrics. First off—their leggings and tights! We mentioned this earlier, but you really should wash them after each wear. Even if you don’t notice it, chances are, there’s a good amount of sweat on the fabric—especially if you’ve been working out!

washing asos4505 leggings

Are ASOS 4505 Leggings and Tights Machine Washable?

Most if not all of their leggings are made from polyester and spandex, which means that, yes—they are machine washable! Before you throw them in without a second thought, though, read the care tag label. After all, some might require special attention. For instance, those with mesh panels tend to be more delicate.

Once you’ve confirmed the instructions, you can prepare them for the wash. What does that entail? Turning the fabric inside out. Believe it or not but that will actually help to extend the life of your leggings. How? By minimizing the amount of friction between the outer surface and the rest of your clothes. Not to mention that it’ll expose the dirty layer (sweat and body oils tend to get trapped in the inside) to the detergent water.

Pro-tip: It’s a good idea to put your ASOS 4505 leggings in a mesh bag—that way, you won’t have to worry about them becoming deformed (which can happen). If you don’t have one, you can improvise by placing the bottoms in a clean pillowcase.

adding detergent to washer

The next thing that you want to do, after putting the leggings in, is to add the detergent. Assuming that you’re washing a few pairs, a scoop of ACTIVE detergent will do. From there, set the settings. Generally speaking, you want to wash the items with a cold, gentle cycle. Avoid using hot water. While polyester and spandex are heat-resistant, there’s always a possibility that the fabric can become warped. Likewise, you want to skip on the fabric softener. Not because it deforms the leggings, though, but because it will get rid of the moisture-wicking finish!

Press the start button and wait for the wash cycle to finish. Afterwards, transfer the items to the drying rack or clothesline. Do not use the dryer as the heat will harm the leggings. For one thing, that’s a real chance that it can cause your leggings to shrink!

Washing ASOS 4505 Leggings by Hand

Consider washing your leggings by hand every once in a while—they’ll last much longer without the agitation of the machine! The process is quite simple. You want to start by filling the sink or tub with lukewarm water (avoid hot water as it can cause the colors to bleed). Add a scoop of ACTIVE detergent and mix until it’s combined.

Next, you want to add your leggings. Make sure that you’ve separated them by color and that they’re turned inside out. Swirl them a few times around the sink. From there, you want to let it soak for about 15 to 20 minutes. Afterwards, clean the leggings by rubbing the fabric against itself—gently.  When you’re done, place it directly under the running tap to remove the detergent. Continue until the water runs clear and there are no more soap bubbles.

Transfer your leggings to a clean surface. Avoid wringing them like a towel as that can harm the fibers. What you want to do instead, is to lay it out on a towel. Roll it up tightly and you’ll be able to remove most of the excess water. With that done, you can hang it up to dry (ideally in a well ventilated room). Most synthetic fabrics will dry quickly.

Note: ASOS 4505 shorts and tops can be washed in the same way as they’re made from the same types of fibers.

Washing Instructions for ASOS 4505 Sports Bras

ASOS offers a variety of sports bras as part of their activewear collection. As with their leggings, you don’t want to leave them in a pile in your room. If possible, wash them after you come home from the gym!

how to clean asos4505 sports bras

Putting ASOS 4505 Sports Bras in the Washing Machine

The first step is to turn the sports bra inside out (for the same reasons as their leggings). Given that they fall into the “delicates” category, you might want to put them in a mesh laundry bag—that way, you won’t have to worry about them being damaged in the machine (this is especially true for those with mesh).

Note: You can wash ASOS 4505 sports bras with other garments as long as they’re color compatible. In other words, don’t wash your white bra with a pair of black leggings!

Place the mesh bag into the machine and add a scoop of ACTIVE detergent (more if you’re washing a larger load). Set the cycle settings—you want to wash everything with cold water on a delicate cycle. Avoid hot water unless you want your sports bras to become deformed. Skip the fabric conditioner.

Pro-tip: Washing a sports bra with removable pads? If so, consider taking them out before putting the bra in the washer—that will make them much easier to deal with (they tend to shift and move during the washing process). You can wash them separately by putting them in their own laundry bag. Simply place them back in when everything is dry.

Wait for the cycle to finish. When it’s done, take out your sports bras. Ideally, you want to let them dry on a drying rack. Clotheslines can be used, but be careful not to hang them by the straps as they can stretch. Never put them in the tumble dryer.

Washing ASOS 4505 Sports Bras by Hand

It’s a good idea to hand wash your sports bras from time to time—that way, they won’t have to go up against the agitation of your washing machine. The process is simple too. The first thing that you want to do is to flip it inside out. Consider taking the cups out if they’re removable, otherwise, you can just leave them in.

Fill the sink or tub half full with water. Pour in a scoop or so of ACTIVE detergent and mix to create a soapy mixture. The next step then is to place your sports bra in the detergent water. Swirl it a few times so that all of the fabric is immersed and allow it to soak for at least 15 minutes.

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Gently massage the bra with your hand (pay extra attention to the pad area). Once it’s clean, rinse off the detergent residue with clean water. Continue until the water comes out clear—you do not want there to be any leftover soap!

Place the sports bras on a clean towel and roll it up to get rid of the dampness. You can also blot it dry. From there, transfer it to a clothesline or drying rack and let it air dry. Remember, the last thing that you want to do is to put your sports bra in the dryer! It will not last in the heat.

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