MSR ZipSet: MSR's ZipSet is a line of insulated water bottles and hydration systems. If you are referring to an "8" size, it could relate to an 8-liter hydration bladder or a related product.
KT - Sea to Summit or similar: Sometimes, product lines or model numbers include "kt" which could be a shorthand for a specific model or series. Sea to Summit is another brand known for outdoor gear. kt so zipset 8 top
SO - Specific Model or Series: Without more context, "so" could refer to a specific model, material (like silicone), or another product line descriptor. Possible Interpretations:
If you're looking for a hydration system or insulated bottle: MSR ZipSet : MSR's ZipSet is a line
I’ll assume “kt so zipset 8 top” refers to knitting a top (garment) using Knit Together (kt), Slip One (so), zipset stitch pattern, size 8 (bust or pattern size), and making it a top (tank or tee). If you meant something else, say so.