Treasure Island Music Festival tickets safely tucked away in wallet? Check.

Spotifying this weekend's lineup all day? Check.

Excitement? Check.

The preparation starts there, and ends here, with seven essentials to get you through the upcoming two days of music madness.

1.  Kiehl's Activated Sun Protector SPF 50, $23

The island's forecast is promising, but even if it's a little overcast out, you'll still need that sunscreen -- this one's top-rated and not greasy.

2.  Rickshaw Bagworks Velo-Edition Backpack, $149-$169

Check the festival's rules for what you can and can't bring. Toss your necessities in this low-profile, bike-friendly pack and you'll be good to go. P.S. Did we mention there's Bike Valet, plus a free shuttle ride to Treasure Island?

3.  Mophie Juice Pack Reserve External Battery, $34.95

Let's face it, with all of your snapshots and Facebook updates, your phone's battery doesn't stand a chance. Recharge with this handy dandy device. 

4.  Adidas AR-D1 Low-top Leather Sneakers, $75

Sneakers are a must for comfort and smooth leather is your best bet for the inevitable beer and Sriracha spillage. 

5.  Patagonia Nano Puff Vest, $149

Layer up against the Bay breeze and chilly nights with this ultra-lightweight, packable shell. 

6.  SF Giants Fleece Throw Blanket, $24.99

If you're going to kick back and lounge, you might as well do it while showing some Giants pride. Let's hear it for our boys. 

7.  Benny Gold Truck Label Snapback Baseball Cap, $22.40

We like multi-purpose things. Baseball caps are great for keeping your cool during the day, staying warm at night, and for covering up your too-hungover-to-shower festival day-two hair. 

Lily Ko (lily7x7 @gmail.com) studied fashion design and merchandising at Central Saint Martins and the Academy of Art University. In addition to writing for 7x7, Lily is on the creative team at Pottery Barn, and works as a freelance stylist, writer,  and designer.