The Proximal Hamstring Tendinopathy (PHT) cushion is made from high density foam to support & disperse pressure. Product features: Cut-out designed to relieve pressure for those suffering with PHT Wave cut foam for even pressure distribution Discreet cover included (removable & washable in navy blue & black) Handmade in Devon, UK 2 year guarantee Available in two thicknesses (thicker version for heavier individuals (95kg/15 stone+) & two sizes Suitable for home, office & travel Helps heal & comfort: Proximal Hamstring Tendinopathy (PHT) Hamstring pain when sitting Standard 6cm: L42.5 x W41 x 6cm Standard 10cm: L42.5 x W41 x 10cm Armchair (Larger) 6cm: L49.5 x W48 x 6cm Armchair (Larger) 10cm: L49.5 x W48 x 10cm The recommended maximum weight for achieving the full benefits from our Sero Pressure Cushions is 115kg. To purchase spare cushion covers please click here.