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We report L-band VLA observations of 1RXS J0603.3+4214, a cluster that hostsa bright radio relic, known as the Toothbrush, and an elongated giant radiohalo. These new observations allow us to study the surface brightnessdistribution down to one arcsec resolution with very high sensitivity. Ourimages provide an unprecedented detailed view of the Toothbrush, revealingenigmatic filamentary structures. To study the spectral index distribution, wecomplement our analysis with published LOFAR and GMRT observations. The bright`brush' of the Toothbrush shows a prominent narrow ridge to its north with asharp outer edge. The spectral index at the ridge is in the range$-0.70\leq\alpha\leq-0.80$. We suggest that the ridge is caused by projectionalong the line of sight. With a simple toy model for the smallest region of theridge, we conclude that the magnetic field is below $5\,\rm\mu G$ and variessignificantly across the shock front. Our model indicates that the actual Machnumber is higher than that obtained from the injection index and agrees wellwith the one derived from the overall spectrum, namely ${\calM}=3.78^{+0.3}_{-0.2}$. The radio halo shows an average spectral index of$\alpha=-1.16\pm0.05$ and a slight gradient from north to south. Thesouthernmost part of the halo is steeper and possibly related to a shock front.Excluding the southernmost part, the halo morphology agrees very well with theX-ray morphology. A power-law correlation is found between the radio and X-raysurface brightness

Deep VLA observations of the cluster 1RXS J0603.3+4214 in the frequency range 1-2 GHz