100% Cotton 【2 Sizes + Neck Support】Standard/Queen (20"x28") & King (20"x36"); side gusset enhances neck support, fits home/hotel use 【Down Filling + Pillow Shams】90% grey goose feathers + 10% grey goose down, balanced softness (suits all sleep positions); 2 striped shams included for comfort & decor 【100% Cotton Leak-Proof Cover】Breathable, skin-friendly cotton; high-density down-proof lining prevents leakage for clean sleep 【Washing Instructions】Machine wash cold on gentle cycle; tumble dry low until fully dry to maintain fluffiness 【Practical + After-Sales】Great for gifting/self-use; quality guaranteed—contact us promptly for any issues