Birkenstock Leather-Lined 3/4-Length Air Cushion Insoles Slippers They have an anti-friction top

They have an anti-friction top cover to help your feet feel comfortable all day and night long

Metatarsophalangeal Joint

where most bunions occur

these plates are not trim-able

Birkenstock Leather-Lined 3/4-Length Air Cushion Insoles Slippers They have an anti-friction topOverview The Birkenstock Air Cushion 3 4 Length Leather Lined Insoles offer heel & midfoot cushioning to help alleviate pressure and provide added foot comfort. Designed based on footprints in sand, the insoles feature thinner cushioning under the heel and thicker cushioning under the arch and metatarsals where the foot is naturally raised. Perfect for providing additional cushioning in tighter fitting shoes where full length insoles aren't an option.