A weighted blanket isn't a regular duvet, and washing it like one is the fastest way to shift the fill, split a seam, or wreck your machine. Here's the actual method — by fill type, by machine, and by what to do if yours simply won't fit in either.
Most weighted blankets can be washed — the question is how, not whether. The fill inside is what decides everything: glass microbeads behave differently in a machine than plastic poly pellets or sand, and the wrong cycle can shift weight unevenly across the blanket permanently. Here's the method that actually protects it, plus what changes if yours is too heavy for a standard washer.
Before You Start: Check the Fill
Check the care label first — it will usually name the fill directly. If it doesn't, the general rule holds: glass microbead fill (fine, sand-like, evenly distributed) is the most machine-friendly of the common fills, since the beads are small enough to move freely through the stitched pockets without clumping. Plastic poly pellets are bulkier and more prone to shifting in a spin cycle. Either way, the same core principle applies below.
Method 1: Machine Washing
- Use a front-loading machine if you have one. Top-loaders have a central agitator that can concentrate all the weight against one point of the drum, straining the seams on a full spin.
- Cold water, gentle cycle, no fabric softener. Softener coats the fibres around the fill pockets over time and makes the stitching more likely to loosen.
- Check your machine's weight limit first. Most home washers cap out around 7–8kg wet weight — a 6.8kg blanket is right at that line before water weight is added, so this step matters more than it sounds.
- Wash it alone. Mixing it with other laundry adds uneven weight to the drum and increases the chance of an off-balance spin cycle.
Method 2: Hand Washing (Oversized Blankets)
If your blanket is too heavy for your machine, or the care label recommends against machine washing altogether, hand washing in a bathtub works just as well — it just takes longer.
- Fill the tub with cold water and a small amount of mild, unscented detergent. Submerge the blanket and let it soak for 10–15 minutes rather than scrubbing immediately.
- Gently press and knead the fabric rather than wringing or twisting it — twisting is what shifts fill unevenly inside the pockets.
- Drain and refill with clean water to rinse, repeating until the water runs clear of soap.
- Press out excess water flat, don't wring. Roll it in a dry towel and press down to draw out water before moving to drying.
Drying It Properly
Air drying flat is the safest option for any weighted blanket, though it takes longer than a dryer. If you do use a machine, tumble dry on low heat only, and stop periodically to shake and redistribute the fill — this is the single most effective way to prevent beads or pellets from settling permanently into one section. High heat is the most common cause of warped stitching and clumped fill, so it's worth the extra time to avoid it.
Mistakes That Damage the Fill
- Washing on a hot or heavy-duty cycle. The extra agitation is built for tough fabrics, not for keeping fill evenly distributed.
- Using bleach or strong stain removers directly on the fabric. These weaken the stitched seams that hold each fill pocket closed over repeated washes.
- Hanging it to dry by one edge. All the wet weight pulls downward through that one seam — lay it flat instead, ideally rotating it once it's partially dry.
- Skipping the weight-limit check. An overloaded machine on a heavy spin cycle is the most common cause of a genuinely damaged (not just shifted) weighted blanket.
Where This Fits
The Weighted Gravity Blanket · Slate uses a glass microbead fill for exactly this reason — it's the most forgiving option for regular washing, and it's what keeps the blanket feeling consistent wash after wash rather than lumpy after the third one. The same glass microbead fill is behind the Nightfall Weighted Eye Mask, if you're building out the rest of the ritual.
Weighted Gravity Blanket · Slate
6.8kg, glass microbead fill, 152 × 203cm. The blanket this guide is written for.
Shop the BlanketNightfall Weighted Eye Mask · Dusk Violet
Same glass microbead fill, scaled down for the face — pairs naturally with the blanket.
Shop the Eye MaskA ritual only works if it stays consistent — care is part of that.
See the full spec, weight, and fill details on the Weighted Gravity Blanket · Slate.
Frequently Asked Questions
Can you wash a weighted blanket in a normal washing machine?
Most can, provided the wet weight stays under your machine's limit and you use a front-loader on a gentle, cold cycle. Oversized or very heavy blankets are usually safer hand-washed in a bathtub instead.
How often should you actually wash it?
Every 4–6 weeks for the blanket itself is reasonable for most households, with a duvet cover (if you're using one) washed weekly like any other bedding — the cover takes most of the everyday wear.
Can you put a weighted blanket in the dryer?
Yes, on low heat, with periodic pauses to redistribute the fill by hand. Air drying flat is still the gentler option if you have the time.