Gym Bag Beauty Essentials

I have recently joined the gym again after almost a year of sitting on my arse doing plain old nothing in terms of working out. After having spent six months in America, I could probably do with losing a few pounds, and mostly toning up. 
Much to my surprise, I have gotten into it much more than I thought I would and have so far been sticking to my plan of going 3-4 times per week. But it's probably the few minutes in the sauna after my session that actually gets me to the gym... 
Most of the products I have in my gym bag aren't anything special - deodorant, hair brush, shampoo... But all pretty essential when you're looking like a hot sweaty mess! I do have a couple of pamper products in there though - my Origins Ginger Body Souffle and Shower Gel. These smell truly amazing and leave my skin feeling silky smooth. Unfortunately, the body lotion is all but gone... Luckily enough I'm already hanging my nose over something new ;). 
I never wear makeup to the gym, so I tend to wash my face in the shower using Clinique's Face Wash and follow up by using my Embryolisse Lait Creme Concentre Nourishing Moisturiser. In terms of my hair, I don't tend to use conditioner much anymore. My hair just doesn't need it, so I'll occasionally use the Argan Oil of Morocco Hair Oil or the It's a 10 Miracle Leave in Product. This detangles any little knots and gives my hair an extra bit of shine. 
What are your must have products in your gym bag?