Quote Originally Posted by mbhandy
Why would the box pleat keep you warmer? :confused: I thought it was less material.

MrBill
The construction of the box pleat tends to trap air in the pleat and the trapped air acts as a very efficient insulator, whereas with a knife pleat, the construction of the pleat actually forces air out of the pleat, removing any air insulation and making the fabric itself the only insulator. The amount of wool used becomes irrelevant if the kilt construction is less efficient, so a knife pleated kilt that uses more material should be colder than a box pleated kilt that uses less.