Original sentence: (Without underwear beneath their kilts.The members of several kilt-wearing military regiments do not wear undergarments, and whether for the sake of tradition or for comfort, many contemporary kilt-wearers choose to go "regimental"
Edited sentence: The members of several kilt-wearing military regiments do not wear undergarments, and whether for the sake of tradition or for comfort, many contemporary kilt-wearers choose to go without underwear beneath their kilts