New Design of SOS Hydrapac, the improved features are as follows-

• Easy access to fill/re-fill bladder
• Flame Resistant
• Self-extinguishing sewing threads made from long staple spun meta-aramide fibres. ISO.15025 (2.03)
• Insulating foam (- operating temperature -80C to 100C) Irradiation cross linked polyolefin foam with factory applied reinforced 9 um foil and G60 acrylic adhesive backing
• Foil lining- ISO5659-2 (1994) Smoke Density and Toxicity (with gas analysis)

AS-1530.3 (1989) Spread of flame index, Heat-Evolved Index, Smoke Develop Index

• No Velcro, no zipper, no Plastic (except for the mouthpiece) which can be covered.
• The press-studs are black oxide brass which are fire resistant and do not rust.