I want to try Arc'teryx Therme Parker small and medium on, but I couldn’t find any stores have an inventory here in Plano, Texas. My body measurement is; Sleeve: 33", Chest: 37", Waist: 33", Hip: 37". So, it seems a small will works for me, but I'm wondering is it still comfortable even wearing a blazer in it or no. I'm planning to place an order this jacket until member's 20% off ends. So, I wonder if I can exchange size without any payment.