Tunnel tent porches 1 capacity 1 man poles dac application trekking outer materials polyester ripstop outer material property 75d inner material mosquito net hydrostatic head flysheet 4 000 mm hydrostatic head groundsheet 10 000 mm base materials nylon pu coated 70d pole diameter 9 mm anchoring luminous guylines construction double wall tent waterproof outer wall breathable inner tent included in delivery guylines pegs inner tent dimensions