The towel should be easy enough to find in a market. Check Russian market, Olympic market and Central market (in that order) first.I believe some budget hotels have that type of towel so you could ask them
All other travel gear you will have to hunt for. There is no specialized shop where you could find everything in one place. I don't even know what travel gear you're looking for...
Try the City Mart shop in Sorya Mall (near Central Market). It's on the 2nd or 3rd floor and has a selection of travel gear, suitcases, sports equipment and branded shoes.
First of all, thank you for your answers.
Still no luck with the travel bath towel. The ones that pack small, light and dries quickly.
Other things I am looking for:
1) Rain poncho that can also cover my 50L backpack.
2) Hammock with integrated mosquito net.
3) Tarp to cover the hammock. Light and packs small if the poncho can't be used for that too.
Rain ponchos & hammocks can be found at many markets. Got the poncho for $8.5. Still looking for a hammock with built in mosquito net (like Hennessy). With some Modifications the Poncho can be used as a tarp to cover the hammock.
Dry bags can be found at:
Scuba Nation Diving Centre
No. 18Eo, Samdech Sothearos Blvd (3), FCC area, 12206 Phnom Penh
#65 St 105 Phnom Penh
You can get the hammock with integral net at most markets - look for a green camoflague pack on a stall with other hammocks. Definitely available at Central Market, Old Market (on the Street 110 side, stall near the entrance to the wet market) and Russian Market.
I was in City Mart last weekend - lots of travel stuff, would be surprised if they don't have travel towels. Or you could try Aeon Mall which opened this weekend, next to Sofitel.