Here is a really hand folding net. It is primarily for a boat, but has a belt clip and can be carried. It has a soft net bag and weighs in both pounds and kilos.

FOLDING BOAT WEIGH NET
Kilwell Brand
Soft Net Bag
Length Opened - 1070mm
Length Folded - 600mm
Width - 430mm
Bag Hang Depth 720mm
Belt Clip
Weigh Scale to 14lbs - 6.5kg