Product Description The Sienna Ultimate Plein Air Backpack is the finishing touch to your plein air setup. It is the perfect accessory to carry all of your plein air gear. It will easily fit the Sienna Large Pochade Box, Supply Box, and Wet Panel Box, Tripod, brush cleaner, and all of your other painting supplies. It has three large interior compartments, an extra thick padded back, comfortable padded shoulder straps, and is durable enough for all of your painting adventures.