Held Tri-Tec Lumbar Protector. Made of elastic fabric and comfortable 3D foam. Lined with Outlast® material that regulates temperature, offering maximum comfort. Removable SAS-TEC® protector. Two extendable flaps with Velcro for a perfect fit. The sizes correspond to the following waist measurements: S (65-85cm), M (80-95cm), L (90-115cm), XL (110-125cm) and XXL (130-155cm).