ActiLymph Class 1 Thigh Length 18-21 mmHg Sand Large ActiLymph Class 1 Thigh Length 18-21 mmHg Sand Large Image is for illustration purposes. ActiLymph Class 1 Thigh Length compression hosiery provides graduated compression of 18-21 mmHg and is designed to support the management of lymphoedema and associated swelling. This thigh-length garment offers comfortable, graduated compression from the foot upwards and is supplied in a discreet Sand colour. The Large size is intended for users whose measurements correspond to the manufacturer's sizing guidance. Correct measurement and fitting are important to help ensure effective and comfortable compression.