The super-cushy Women's Base Camp Slide III has a comfortable. bandage-style strap that's made with a combination of P.E.T. mesh foam and a recycled version of the fabric from our iconic Base Camp Duffel. UPPER/ TPU strap made with 5% recycled P.E.T. mesh foam and lined with 100% recycled polyester / SOLE UNIT/ '-density EVA-foam midsole/outsole offers a comfortable. lightweight feel