Arma Hot/Cold Relief Boots. The Arma Hot/Cold Relief Boots can be used either hot or cold for tendon and ligament relief. The relief boots are suitable for use on lower legs and are made from neoprene with bound edges and touch close straps which allow a for a secure, supportive fit. The internal gel packs secure with touch close fastenings. When cold the boots are ideal for speeding recovery after strenuous work, reducing swelling, limiting internal bleeding and inflammation and treating arthritic heat. When hot the relief boots increase circulation and encourage blood flow to speed up the healing process, relax tightened muscles and help ease stiffness and arthritic conditions.