to the OP, I find the velcro seams to be very solid seal. I have had two TM's in the past 10 years and I have not had any issues with the velcro seals. I also use it as a shelf area for various things. Its a solid as it possibly can be. As many here know, I recently spent two weeks in northern AZ winter camping and I can offer a testimonial that I had no heat loss, cold wind through the velcro seal system. For anyone considering their options with a TM, there will be positives and negatives throughout the selection process. The velcro should not be a concern.