Im really new to the sport so perhaps when using the seat harness it wasent tight enough around the legs. But I found it to be extreamly uncomfortable, it rides up a little and with different movements through stacking ect and adding the fact I dont ware underware it is a definate trap for your nuggets

. After a very painfull experiance I have used a waist harness since and have loved it safe for my nuggest to sway in the breeze (as little the sway my be) and doesnt seem to ride up as much.
But Im sure they wouldnt design and market the nugget traps if everyone had this oppinion