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Vynix US via Amazon [amazon.com] has Vynix 3D Blackout Sleep Mask for Side Sleepers (Black) on sale for $9.99 – 50% off when you enter the coupon code SRYJSXHU = $4.99. Shipping is free w/ Prime or on $35+.

Product Description from Amazon:[list][*]100% Light Blackout – Sleep in True Darkness: Vynix sleep mask features a flexible one-piece nose bridge and 360° contoured design, this soft eye mask for sleeping blocks all light for complete darkness, giving you a pressure-free sleep environment, so you rest deeply anytime, anywhere