Earth Therapeutics Moisturizing Foot Socks Socks for sleeping beauties. Worn over our Tea Tree Oil Foot Repair Balm, these socks soften and repair feet overnight. They work with your body temperature to seal in and ease the penetration of emollients, gradually softening hard skin and calluses. Cotton (90%) and lycra (10%) blend breathes to keep feet cool and comfortable. One size fits all.