Phase Change Cooling Neckwear TechNiche's Phase Change Cooling Neckwear Inserts maintain a comfortable 58 degrees F (14 degrees C) for heat stress relief. They are ideal for cooling the upper body.   Phase Change Cooling 6619 Standard Neck Bands Tie fasten 100% cotton (excluding insert) Royal Blue One Size Include one (1) Phase Change Cooling Standard Neck Band Insert (6661)     Phase Change Cooling 6661 Standard Neck Band Inserts Use additional inserts for continuous relief from the heat Include one (1) Phase Change Cooling Standard Neck Band Insert For Phase Change Cooling Standard Neck Bands (6619)     Phase Change Cooling 6620 Deluxe Neck Bands Hook & loop closure for a lower profile fit 100% cotton (excluding insert) Royal Blue One Size Include one (1) Phase Change Cooling Deluxe Neck Band Insert (6662)     Phase Change Cooling 6662 Deluxe Neck Band Inserts Use additional inserts for continuous cooling relief Include one (1) Phase Change Cooling Deluxe Neck Band Insert For Phase Change Cooling Deluxe Neck Bands (6620)