Roho Planar Solid Seat Insert 18 x 18 x 3 8 Birch Plywood Thermometer DIA: 10mmHg~150mmHg Underpads DIA: 10mmHg~150mmHg The hard but flexible shields of the hip protectors cover and protect the neck of the femur * Features a simple comfortable discreet pair of pants made of white cotton and lycra * Machine washable * Mens style features a fly opening while the womens style has a lacy waist and leg band * Fits waist size 26 32 Provides a solid base for use with ROHO cushioning products * Made of polyurethane coated birch plywood * Easily fits under the cushion inside the ROHO cushion cover * Eliminates the hammocking effect of sling seats * Helps prevent internal rotation of the femurs * 12 Month Limited Warranty *